Ustteshal-combustiojm engine



Jan. 15, 192-9.

E. F. MOHATT ET AL INTERNAL COMBUSTION ENGINE Filed May 8. 1928 4 Sheets-Sheet 1 In Wei/tors By EM 405% Attorney Jan. 15, 1929. 1,698,920

E. F. MOHATT ET AL INTERNAL COMBUSTION ENGINE Filed May 8, 8 Sheets-Sheet. 2

LD- CD.

JII.

. //J K\ "\L w I lee C fl4aZaZZ Attorney Jan. 15, 1929. 1,698,920

- I E. F. MOHATT ET AL INTERNAL COMBUSTION ENGINE Filed May 8, 1928 4 Sheeis-Sheet 5 J90 (V /028 ,ZIJWQI'J F/Kolafi Atto r7113;

' lnventors Jan. 15, 1929. I 1,698,920 E. F. MOHATT ETAL INTERNAL COMBUSTION ENGINE Filed May 8, 1928 4 Sheets-Sheet 4 Inventory Attorney Patented Jan. l5, i929.

tiiTEE rese EDWARD F. MGHATT AND LEO C. Il'IOl ZATT, F RIVER, VTYOIVIIIIG.

INTERNAL-COMBUSTION ENGINE.

Application filed May s, 1928. Serial No. 276,1'73.

The present invention relates to an internal combustion engine and has for its prime object to provide an engine of the multi-cylin der type, preferably of the eight cylinder type with the cylinders divided into two equal series, the series being oppositely disposed.

another very important object of the invention resides in the provision of an internal combustion engine of this nature with a crank shaft structure including an outer and inner portion and means for rocking the portion. a

Another very important object of the invention resides in the provision of amechanism in conjunction with an internal combustion engine of this type for taking off the power therefrom.

A still further very important object of the invention resides in the provision of an internal combustion engine of this nature vhieh is comparatively simple in its construction, compact in its arrangement of parts, strong and durable, powerful, economical, thoroughly efficient and reliable in its operation, and otherwise well adapted to the purpose for which it is designed.

lVith the above and numerous other objects in view as will appear as the description proceeds, the invention resides in certain novel features of construction, and in the combination and arrangement of parts as will be hereinafter more fully described and claimed.

In the drawings:

Figure 1 is a top plan view of an engine embodying the features of our invention,

Figure 2 is a side elevation thereof,

Figure 3 is an end elevation thereof,

Figure 4 is a horizontal longitudinal section therethrough,

Figure 5 is a longitudinal vertical section therethrough,

Figure his a vertical transverse section' in series, one series being opposite the other so that there are always two opposed cylinders connected together and having their lower portions at the center provided with longitudinally extending slots 6. A crank easing 7 is disposed under the block and has journaled therein an outer hollow crank shaft 8 and an inner crank shaft 9. Cranks 10 project from the outer crank shaft 8 and cranks 11' project from the inner cranl' shaft 9 through slots 12 in the outer crank shaft 8.

Pistons 1d are reciprocable in the cylinders and the pistons of two cylinders which are connected together in opposed relationship are connected by a sin -1e connecting rod 15 with which one of the cranks 10, 11, is pivotally connected as at 16, the crank 10 connected to one pair, and crank 11 being connected with the rod of the adjacent pair of cylinders. The connecting rod 15 is formed in pivotal sections is indicated to advantage in Fig-- ure 5, the sections being pivoted together also at 16.

L The cranks l0 and 11, of course, extend through the slots 6. The cylinders 5 are preferably of the L-type having firing chambers 18 with valve seats 19 therein for the intake and exhaust gas and v'th these seats are associated valves 20 having valve stems 21 slidable through bearings 22 and 23 on ton of the cylinder block and terminating to be actuated by cam shafts 24 which are geared together as at 25.

Qne of the gears 25 meshes with a gear 26 whicn is operated by lever 27 eccentricallv engaged on one end of the inner crank shaft 2) to be rotated thereby. A beveled gear 28 is fixed to one end of the outer crank shaft and a beveled gear 29 is fixed to the adjacent end of the inner crank shaft 9 in spaced relation to the beveled gear 28 and beveled in an opposite direction.

A stationary member 30 about the shaft 9 upwardly and downwardly extending pintles 81 on which are rotatable bevel gears 32 meshing with the gears 28 and 29. One of these gears 32 has a crank 34 secured thereto for taking off power from the internal combustion engine.

Spark plugs extend into the firing chamber 18 and will be in circuit with a suitable distributor timed to operate the pistons in the cylinders on the usual well known four cycle principle. lVhen the engine is thus operating it will be seen that the piston reciprocates back and forth and rocks the cranks l0 and 11 to correspondingly rock the inner and outer shaft thereby rocking the beveled gears 28 and 29 in opposite directions and causing the rocking of the gears 32 and the oscillation of the take off crank 34.

'lhns-we do away with thensual form of the crank shait now inconnnon use and attain more power because of less resistance and utilize the full stroke of the piston.

It is thought thatthe construction, operation, and advantages of the invention will now be quite apparent to those skilled in this art without, a more detaileddescription thereoi'. The present embodiment oil the invention been disclosed iii-detail merely by way o-t' Olizlllll since in actual ractice it attains the lea-titres oi advantage enumerated as desirable in the staten'icnt of the invention and the above "(,lescriptiono it \vill bc ap 'iarenttinitchanges in the det'aiisot? construction,and in the combination and anrangenientoo parts-may: be resorted to "boutdeparting from the spi it or scope of he inrentionias hereinafter claimedior sacriicing any of itsadvantages.

Having thusdcscribed' our inventioiniwha' we claim as new is 1. In an internal combustion engine of the class described, an engine blockinclndi g a plurality of cylinders arranged in pairs, the cylinders of each pair being oppositely disposed and connected together and having slots in theircentral; portions, said cylinders chambers at their outer ends ciated i h said firing chainbers, spark pings co ed iii said firing eli-an'ibers, plStOllS ida lc in the cylinders, connecting rods projecting inwardly from the pistons and pivotnlly connected together, the pistons o'l one pair of cylinders working. opposite to the pistons in the next adjacent pair, a pair of crank shafts one being hollmv'so'tli-at other may be disposed therein, the hollowvcrank shaft havii slot-s, cranks connected with the c :ank shaft-,cran-lcs from the inner crank-shafts extending through the sloto't the outer crank shai't, said cranks being 'iivotally connectet with the pivoted ends of the connecting rods.

in an internal ciinilnmtion engine oi? the class described, an engine block including a pho -ality oi cylinders arranged in pairs, thc cylimlers of each pair being oppositelydisposed and coni'iected together and having slots in their central portions,.said c ydinders having tiring chambers, at their outer ends, valve'ineans associated with saidl'iring chainhers, spark plu engaged in saidifiring ch ainbe pistons slidablein the cylinders, connmting rods projecting inwardly from the pi: onsand pivotally connectedtogether, the pistons of one pair of cylinders working opposite to the pie" in the next adjacent-pair, a pair o'l crank sliaitsone being hollow 5) that the other may be d' iosedtherein, the hollow c-ran shaft having. slots, cranks connected with. tbe'crank shatt cranks from the inner c-rank'sllafts extending throughthe slot of the outer crankshatt', said-cranks being pivotally connected witlrthe pivoted endsol? the connecting rods, n'ieans for operating the valve n'ieans lrointhe inner crank shaft;

3. In an internal combustion engine of the class described, an engine block including a plurality of cylinders arranged in pairs, the cylinders of each pair being oppositely disposed and connected together and having slots in. their central portions, said cylinders having tiring chambers spark plugs engaged in said firing clianibe s, pistons slidablc in the cylinders, connecting rods projecting inwardly from the pistons-andpivotally col'inected together, the pistonsot on pair of cylinders working oppot vto the pistousin t e not adjacent pair, a pair oi? crank sha'li'ts one being hollow so that. the other may be disposed therein, the hollow crank snatt hiirinpr slots, cranks connected with the crank shatt, cranks from the inner crankshafts extending tl gh. t slot of the outer crank shaft, said cranks being pivotally connected withthe pi-votedends of the connecting rods, means for operating the valve: means from the inner crank shat a beveled-gear on the end: otithe onto-r crank sha it, a beveled gearon the end of the inner crank shattoppositely bevcied from the first mentioned gear, a stationary 1n cinbcr having pintles extending. therefrom, bevel gears rockable on the Dintles and inesliing with the first mentioned beveled 'vgears,

4;. In an internal combustion. engine ofthe class deseribethan e1 no bfloeleinc inga plurality of cylinders--arrangedlinpairs, the cylinders of each-pair being. oppositelydisposed and connected together and. having slots in'their central portions, said cylinders having. firing. chambers nark-plugs engaged in said firingchanibers;p tons slidable in the cylinders, connecti ng.roclsprojec-tingdnwai'cl- 1y from the pistons and pivotally connected together, the'pistons oi? one pair of cylinders working opposite to l'l'ie-pistonsdnthe next ad] a cent pair, a pair oli crank :shat'tsone being hollow so that thoother may be disposed therein, the hollow crank .shaiit having slots, inecled-zwi th the crank shaft, cranks the inner crank shafts extending through the slot ol the outer crank shalt, said, cranks beingpivotally connecterl'with the pivoted ends oi? the connecting; rods, means for operating: the valxenieans from the inner crankshaft, a beveled gear on'the end of the outer crank shaft, a beveled gear on the end of: the inner crank shaft" oppositely beveled from the jlirst mentioned gear, a stationary member having pintlcsextending therefrom, bevel gears rockable on the pintles and meshing with the firstznentio edabeveled one of thelast inentioned beveb gears provided with a: crank thereon to take: off power tt'ronr the internal combustion en gi-ne.

In testimony whereof we atfix our signa turcs. 7 

